[English] 日本語
Yorodumi
- EMDB-32828: Inhibited EP-complete -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: EMDB / ID: EMD-32828
TitleInhibited EP-complete
Map data
Sample
  • Complex: Enteropeptidase
Keywordsmembrane protein
Function / homology
Function and homology information


enteropeptidase / brush border / serine-type endopeptidase activity / proteolysis / membrane
Similarity search - Function
Peptidase S1A, enteropeptidase / Scavenger receptor cysteine-rich domain / Domain found in sea urchin sperm protein, enterokinase, agrin / MAM domain signature. / SEA domain superfamily / Domain in meprin, A5, receptor protein tyrosine phosphatase mu (and others) / SRCR domain / SRCR domain profile. / SRCR-like domain / SRCR-like domain superfamily ...Peptidase S1A, enteropeptidase / Scavenger receptor cysteine-rich domain / Domain found in sea urchin sperm protein, enterokinase, agrin / MAM domain signature. / SEA domain superfamily / Domain in meprin, A5, receptor protein tyrosine phosphatase mu (and others) / SRCR domain / SRCR domain profile. / SRCR-like domain / SRCR-like domain superfamily / Scavenger receptor Cys-rich / SEA domain profile. / SEA domain / SEA domain / MAM domain, meprin/A5/mu / MAM domain / MAM domain profile. / CUB domain / Domain first found in C1r, C1s, uEGF, and bone morphogenetic protein. / CUB domain / CUB domain profile. / Spermadhesin, CUB domain superfamily / Low-density lipoprotein receptor domain class A / Low-density lipoprotein (LDL) receptor class A, conserved site / LDL-receptor class A (LDLRA) domain signature. / LDL-receptor class A (LDLRA) domain profile. / Low-density lipoprotein receptor domain class A / Low-density lipoprotein (LDL) receptor class A repeat / LDL receptor-like superfamily / Serine proteases, trypsin family, histidine active site / Serine proteases, trypsin family, serine active site / Peptidase S1A, chymotrypsin family / Serine proteases, trypsin family, histidine active site. / Serine proteases, trypsin family, serine active site. / Serine proteases, trypsin domain profile. / Trypsin-like serine protease / Serine proteases, trypsin domain / Trypsin / Concanavalin A-like lectin/glucanase domain superfamily / Peptidase S1, PA clan, chymotrypsin-like fold / Peptidase S1, PA clan
Similarity search - Domain/homology
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 4.7 Å
AuthorsYang XL / Ding ZY / Huang HJ
Funding support1 items
OrganizationGrant numberCountry
Not funded
CitationJournal: Nat Commun / Year: 2022
Title: Cryo-EM structures reveal the activation and substrate recognition mechanism of human enteropeptidase.
Authors: Xiaoli Yang / Zhanyu Ding / Lisi Peng / Qiuyue Song / Deyu Zhang / Fang Cui / Chuanchao Xia / Keliang Li / Hua Yin / Shiyu Li / Zhaoshen Li / Haojie Huang /
Abstract: Enteropeptidase (EP) initiates intestinal digestion by proteolytically processing trypsinogen, generating catalytically active trypsin. EP dysfunction causes a series of pancreatic diseases including ...Enteropeptidase (EP) initiates intestinal digestion by proteolytically processing trypsinogen, generating catalytically active trypsin. EP dysfunction causes a series of pancreatic diseases including acute necrotizing pancreatitis. However, the molecular mechanisms of EP activation and substrate recognition remain elusive, due to the lack of structural information on the EP heavy chain. Here, we report cryo-EM structures of human EP in inactive, active, and substrate-bound states at resolutions from 2.7 to 4.9 Å. The EP heavy chain was observed to clamp the light chain with CUB2 domain for substrate recognition. The EP light chain N-terminus induced a rearrangement of surface-loops from inactive to active conformations, resulting in activated EP. The heavy chain then served as a hinge for light-chain conformational changes to recruit and subsequently cleave substrate. Our study provides structural insights into rearrangements of EP surface-loops and heavy chain dynamics in the EP catalytic cycle, advancing our understanding of EP-associated pancreatitis.
History
DepositionFeb 8, 2022-
Header (metadata) releaseNov 23, 2022-
Map releaseNov 23, 2022-
UpdateOct 16, 2024-
Current statusOct 16, 2024Processing site: PDBj / Status: Released

-
Structure visualization

Supplemental images

emd_32828.png

Downloads & links

-
Map

FileDownload / File: emd_32828.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.05 Å/pix.
x 256 pix.
= 267.776 Å		1.05 Å/pix.
x 256 pix.
= 267.776 Å		1.05 Å/pix.
x 256 pix.
= 267.776 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.046 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.111
Minimum - Maximum-0.0017032416 - 1.7457111
Average (Standard dev.)0.00090964034 (±0.020075237)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 267.776 Å
α=β=γ: 90.0 °

-
Supplemental data

-
Sample components

-
Entire : Enteropeptidase

EntireName: Enteropeptidase
Components
  • Complex: Enteropeptidase

-
Supramolecule #1: Enteropeptidase

SupramoleculeName: Enteropeptidase / type: complex / ID: 1 / Parent: 0
Source (natural)Organism: Homo sapiens (human)

-
Experimental details

-
Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

-
Sample preparation

BufferpH: 7.6
VitrificationCryogen name: ETHANE

-
Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 52.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 3.4 µm / Nominal defocus min: 0.7000000000000001 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

-
Image processing

Startup modelType of model: INSILICO MODEL
Final reconstructionResolution.type: BY AUTHOR / Resolution: 4.7 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 119676
Initial angle assignmentType: PROJECTION MATCHING
Final angle assignmentType: ANGULAR RECONSTITUTION

+
About Yorodumi

-
News

-
Feb 9, 2022. New format data for meta-information of EMDB entries

New format data for meta-information of EMDB entries

  • Version 3 of the EMDB header file is now the official format.
  • The previous official version 1.9 will be removed from the archive.

Related info.:EMDB header

External links:wwPDB to switch to version 3 of the EMDB data model

-
Aug 12, 2020. Covid-19 info

Covid-19 info

URL: https://pdbj.org/emnavi/covid19.php

New page: Covid-19 featured information page in EM Navigator.

Related info.:Covid-19 info / Mar 5, 2020. Novel coronavirus structure data

+
Mar 5, 2020. Novel coronavirus structure data

Novel coronavirus structure data

Related info.:Yorodumi Speices / Aug 12, 2020. Covid-19 info

External links:COVID-19 featured content - PDBj / Molecule of the Month (242)：Coronavirus Proteases

+
Jan 31, 2019. EMDB accession codes are about to change! (news from PDBe EMDB page)

EMDB accession codes are about to change! (news from PDBe EMDB page)

  • The allocation of 4 digits for EMDB accession codes will soon come to an end. Whilst these codes will remain in use, new EMDB accession codes will include an additional digit and will expand incrementally as the available range of codes is exhausted. The current 4-digit format prefixed with “EMD-” (i.e. EMD-XXXX) will advance to a 5-digit format (i.e. EMD-XXXXX), and so on. It is currently estimated that the 4-digit codes will be depleted around Spring 2019, at which point the 5-digit format will come into force.
  • The EM Navigator/Yorodumi systems omit the EMD- prefix.

Related info.:Q: What is EMD? / ID/Accession-code notation in Yorodumi/EM Navigator

External links:EMDB Accession Codes are Changing Soon! / Contact to PDBj

+
Jul 12, 2017. Major update of PDB

Major update of PDB

  • wwPDB released updated PDB data conforming to the new PDBx/mmCIF dictionary.
  • This is a major update changing the version number from 4 to 5, and with Remediation, in which all the entries are updated.
  • In this update, many items about electron microscopy experimental information are reorganized (e.g. em_software).
  • Now, EM Navigator and Yorodumi are based on the updated data.

External links:wwPDB Remediation / Enriched Model Files Conforming to OneDep Data Standards Now Available in the PDB FTP Archive

-
Yorodumi

Thousand views of thousand structures

  • Yorodumi is a browser for structure data from EMDB, PDB, SASBDB, etc.
  • This page is also the successor to EM Navigator detail page, and also detail information page/front-end page for Omokage search.
  • The word "yorodu" (or yorozu) is an old Japanese word meaning "ten thousand". "mi" (miru) is to see.

Related info.:EMDB / PDB / SASBDB / Comparison of 3 databanks / Yorodumi Search / Aug 31, 2016. New EM Navigator & Yorodumi / Yorodumi Papers / Jmol/JSmol / Function and homology information / Changes in new EM Navigator and Yorodumi

Read more